1946 (MCMXLVI) was a common year started on Tuesday according to the Gregorian calendar.
1946: foundation of the Conquense Balompedic Union.
January 1: In the United Kingdom, the first civil flight takes off at Heathrow Airport, bound for Buenos Aires with a stopover in Lisbon.
January 4: In the United Kingdom, Theodore Schurch is the last person to be executed for crimes committed under the Treason Act of 1940.
January 4: the American company IBM donates 109,000 pesetas to the Spanish dictator Francisco Franco to be distributed among the most needy classes in that country.
January 6: Syd Barrett, founder of Pink Floyd, is born.
January 7: The victorious powers in World War II recognize the borders of Austria from 1937.
January 7: in Buenos Aires, Radio del Estado conducts FM broadcast tests for several hours. 
January 10: in China, Mao Tsé-Tung and Chiang Kai-shek declare a ceasefire after the mediation of US President Harry S. Truman.
10 of January: in Central Hall Westminster (London) the first session of the General Assembly of the United Nations is celebrated.
January 11: in Albania, the dictator Enver Hoxha proclaims the People's Republic.
January 12: the 19th edition of the Copa América begins in Argentina.
January 13: the British government sets the monthly quota for Jewish immigration to Palestine at 10,500 people.
January 17: the United Nations Security Council holds its first session in Central Hall Westminster (London).
January 18: in Mexico, President Manuel Ávila Camacho founds the Institutional Revolutionary Party (PRI) from the PRM.
January 19: Douglas MacArthur promulgates the Charter of the Military Tribunal for the Far East or Tokyo Tribunal.
January 22: in Iran, the notable Kurdish Qazi Muhammad declares the independence of the Republic of Mahabad in Chahar Cheragh Square.
January 28: the so-called Plaza Bulnes Massacre takes place in Chile.
February 1: Hungary proclaims the republic; its president is Zoltan Tildy.
1 of February: the Norwegian Trygve Lie is chosen first secretary general of the UN.
February 1: the Spanish government authorizes the recovery of nationality to citizens who have lost it as a military in the belligerent armies.
7 of February: in the United States, the defense minister supports the plans of Douglas MacArthur to reactivate the Japanese exports.
February 9: the UN General Assembly condemns the Franco regime (in Spain) and prohibits that country from joining the organization.
February 9: in the Soviet Union, Joseph Stalin announces a new five-year plan for the USSR in order to surpass the West in the production of oil, steel and iron.
February 10: in Buenos Aires (Argentina) the Copa América ends and Argentina is Champion for the Eighth Time of the Cup.
February 13: in the United Kingdom the anti-strike law of 1926 is repealed.
February 14: in the United Kingdom - within the framework of the nationalization policy - the Bank of England is nationalized.
February 15: in the United States presentation of the ENIAC, the first electronic computer.
February 20: The case of the murdered woman, by Miguel Mihura, is premiered at the María Guerrero Theater (Madrid).
February 21: in Egypt the general strike provokes repression by the police, with the result of 12 civilians dead.
23 of February: in Bombay, an anti-British demonstration gathers 300,000 strikers.
February 24: in Argentina, Juan Domingo Perón wins the presidential elections with 56% of the votes.
March 1: in Greece, the monarchy triumphs by a large majority in the plebiscite. George II announces his return to Athens.
March 2: in North Vietnam, Hồ Chí Minh is elected prime minister.
March 2: British troops withdraw from Iran in compliance with the